Chamfer error preventing block and error preventing method thereof

The invention belongs to the technical field of mechanical processing detection, in particular to a chamfer error preventing block and an error preventing method. According to the chamfer error preventing block and the error preventing method, a tool and the error preventing block are compared, whether the length of the tool is correct or not is detected, if the length of the tool is correct, positive and negative chamfering of aligned holes, lace edges, bosses and the like is completed, if the length of the tool is not correct, correcting is conducted. According to the technical scheme, the chamfer error preventing block comprises a base and a vertical Z-shaped column, the middle transverse edge of the Z-shaped column is perpendicular to the up-down longitudinal edge, the top of the Z-shaped column is provided with a check structure, the upper surface of the base is provided with an I-shaped through hole and a hole, one end of the Z-shaped column extends into the I-shaped through holeof the base and can free